matlab solve的用法S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*dif
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![matlab solve的用法S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*dif](/uploads/image/z/1633556-20-6.jpg?t=matlab+solve%E7%9A%84%E7%94%A8%E6%B3%95S%3Ddsolve%28%27Dx%3D450%2A%2890%2At-x%29%2Fsqrt%28%2890%2At-x%29%5E2%2B%28120-y%29%5E2%29%2CDy%3D450%2A%28120-y%29%2Fsqrt%28%2890%2At-x%29%5E2%2B%28120-y%29%5E2%29%27%29%E7%BB%93%E6%9E%9C%EF%BC%9A%5By%28t%29%3D120%2Cx%28t%29%3D450%2At%2BC1%2Cy%28t%29%3D120%2Cx%28t%29%3D-450%2At%2BC1%2C%5B%28%2890%2At-x%28t%29%29%5E2%2Fdiff%28x%28t%29%2Ct%29%5E2%29%5E%281%2F2%29%3D%2890%2At-x%28t%29%29%2Fdiff%28x%28t%29%2Ct%29%2Cy%28t%29%3D%28120%2Adif)
matlab solve的用法S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*dif
matlab solve的用法
S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')
结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*diff(x(t),t)+(-diff(x(t),t)^2*x(t)^2+1640250000*t^2-8100*diff(x(t),t)^2*t^2+180*diff(x(t),t)^2*t*x(t)-36450000*t*x(t)+202500*x(t)^2)^(1/2))/diff(x(t),t),y(t)=(120*diff(x(t),t)-(-diff(x(t),t)^2*x(t)^2+1640250000*t^2-8100*diff(x(t),t)^2*t^2+180*diff(x(t),t)^2*t*x(t)-36450000*t*x(t)+202500*x(t)^2)^(1/2))/diff(x(t),t)]]
这个怎么解释
如何求x(t),y(t)
matlab solve的用法S=dsolve('Dx=450*(90*t-x)/sqrt((90*t-x)^2+(120-y)^2),Dy=450*(120-y)/sqrt((90*t-x)^2+(120-y)^2)')结果:[y(t)=120,x(t)=450*t+C1,y(t)=120,x(t)=-450*t+C1,[((90*t-x(t))^2/diff(x(t),t)^2)^(1/2)=(90*t-x(t))/diff(x(t),t),y(t)=(120*dif
你在求解不定积分,出来的肯定是上面的符号表达式了.